W921E840A Datasheet, PDF (57/58 Pages) Winbond – 4-BIT MICROCONTROLLER

W921E840A/W921C840
12. PACKAGE DIMENSIONS
40-pin DIP
40
1
E
1
S
2
AA
L
D
B
e1
B1
21
20
E
1
Base Plane
A
Seating Plane
a
eA
Dimension in Inches Dimension in mm
Symbol _{Min. Nom. Max. Min. Nom. Max.}
A
0.210
5.334
A 1 ^0.010
0.254
A 2 ^{0.150 0.155 0.160 3.81 3.937 4.064}
B
0.016 0.018 0.022 0.406 0.457 0.559
B1 0.048 0.050 0.054 1.219 1.27 1.372
c
0.008 0.010 0.014 0.203 0.254 0.356
D
2.055 2.070
52.20 52.58
E
0.590 0.600 0.610 14.986 15.24 15.494
E1 ^0.540 0.545 0.550 ^{13.72 13.84 13.97}
e1
0.090 0.100 0.110 2.286 2.54 2.794
L
0.120 0.130 0.140 3.048 3.302 3.556
a
0
15
0
15
eA
0.630 0.650 0.670 16.00 16.51 17.01
S
0.090
2.286
Notes:
1. Dimension D Max & S include mold flash or
tie bar burrs.
2. Dimension E1 does not include interlead flash.
c
3.
Dimension D &
are determined
Eat1thineclmu. doeldmpoalrdtinmgislminea.tch
and
4. Dimension B1 does not include dambar
protrusion/intrusion.
5. Controlling dimension: Inch.
6.General appearance spec. should be based on
final visual inspection spec.
48-pin QFP
E
EH
e
Seating Plane
See Detail F
AA
y
θ
L
L1
- 57 -
Dimension in Inches Dimension in mm
Symbol _{Min. Nom. Max. Min. Nom. Max.}
A
0.083 0.087 0.090 2.10 2.20 2.30
A1
0.002 0.008 0.014 0.05 0.20 0.35
A2
0.080
2.00
b
0.008 0.013 0.017 0.20 0.33 0.40
c
0.004 0.006 0.008 0.10 0.15 0.20
D
0.390 0.394 0.398 9.90 10.00 10.10
E
0.390 0.394 0.398 9.90 10.00 10.10
e
0.024 0.030 0.036 0.60 0.75 0.90
H D 0.580 0.590 0.600 14.75 15.00 15.25
HE 0.580 0.590 0.600 14.75 15.00 15.25
L
0.061 0.066 0.072 1.55 1.70 1.85
L1
0.110 0.098 0.126 2.79 2.50 3.20
y
0.003
0.75
θ
0
7
0
7
Publication Release Date: July 1999
Revision A3